/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:20:44,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:20:44,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:20:44,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:20:44,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 04:20:44,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 04:20:44,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 04:20:44,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 04:20:44,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:20:44,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:20:44,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:20:44,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:20:44,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:20:44,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:20:44,372 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:20:44,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:20:44,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:20:44,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:20:44,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:20:44,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:20:44,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:20:44,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:20:44,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:20:44,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:20:44,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:20:44,661 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:20:44,663 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:20:44,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl [2021-06-05 04:20:44,663 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x4.wvr.bpl' [2021-06-05 04:20:44,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:20:44,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:20:44,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:20:44,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:20:44,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:20:44,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,709 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:20:44,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:20:44,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:20:44,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:20:44,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... [2021-06-05 04:20:44,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:20:44,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:20:44,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:20:44,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:20:44,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:20:44,784 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:20:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:20:44,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:20:44,784 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:20:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:20:44,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:20:44,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:20:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:20:44,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:20:44,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 04:20:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 04:20:44,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 04:20:44,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 04:20:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 04:20:44,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 04:20:44,787 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 04:20:44,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:20:44,962 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 04:20:44,963 INFO L202 PluginConnector]: Adding new model exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:20:44 BoogieIcfgContainer [2021-06-05 04:20:44,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:20:44,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:20:44,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:20:44,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:20:44,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:20:44" (1/2) ... [2021-06-05 04:20:44,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d48606 and model type exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:20:44, skipping insertion in model container [2021-06-05 04:20:44,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:20:44" (2/2) ... [2021-06-05 04:20:44,968 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x4.wvr.bpl [2021-06-05 04:20:44,972 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:20:44,972 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:20:44,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:20:44,973 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:20:45,029 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 04:20:45,045 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 04:20:45,077 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:20:45,077 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:20:45,077 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:20:45,077 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:20:45,077 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:20:45,077 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:20:45,077 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:20:45,077 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:20:45,088 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 37 transitions, 106 flow [2021-06-05 04:20:45,149 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:20:45,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:45,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:45,173 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:45,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:45,177 INFO L82 PathProgramCache]: Analyzing trace with hash 500910984, now seen corresponding path program 1 times [2021-06-05 04:20:45,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:45,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392190665] [2021-06-05 04:20:45,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:45,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:45,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392190665] [2021-06-05 04:20:45,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392190665] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:45,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:45,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 04:20:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568304901] [2021-06-05 04:20:45,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:20:45,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:20:45,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:20:45,342 INFO L87 Difference]: Start difference. First operand has 942 states, 940 states have (on average 3.9117021276595745) internal successors, (3677), 941 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:45,431 INFO L93 Difference]: Finished difference Result 1365 states and 5324 transitions. [2021-06-05 04:20:45,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:20:45,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:20:45,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:45,452 INFO L225 Difference]: With dead ends: 1365 [2021-06-05 04:20:45,452 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 04:20:45,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:20:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 04:20:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1069. [2021-06-05 04:20:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.903558052434457) internal successors, (4169), 1068 states have internal predecessors, (4169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4169 transitions. [2021-06-05 04:20:45,525 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4169 transitions. Word has length 19 [2021-06-05 04:20:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:45,526 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 4169 transitions. [2021-06-05 04:20:45,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4169 transitions. [2021-06-05 04:20:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:45,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:45,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:45,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:20:45,530 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1942329299, now seen corresponding path program 1 times [2021-06-05 04:20:45,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:45,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958571320] [2021-06-05 04:20:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:45,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:45,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958571320] [2021-06-05 04:20:45,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958571320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:45,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500455766] [2021-06-05 04:20:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 04:20:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500455766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:45,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:45,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 04:20:45,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553629876] [2021-06-05 04:20:45,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:45,730 INFO L87 Difference]: Start difference. First operand 1069 states and 4169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:45,807 INFO L93 Difference]: Finished difference Result 2313 states and 8847 transitions. [2021-06-05 04:20:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:45,819 INFO L225 Difference]: With dead ends: 2313 [2021-06-05 04:20:45,819 INFO L226 Difference]: Without dead ends: 2313 [2021-06-05 04:20:45,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-06-05 04:20:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1246. [2021-06-05 04:20:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.9710843373493976) internal successors, (4944), 1245 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4944 transitions. [2021-06-05 04:20:45,864 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4944 transitions. Word has length 22 [2021-06-05 04:20:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:45,864 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4944 transitions. [2021-06-05 04:20:45,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4944 transitions. [2021-06-05 04:20:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:45,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:45,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:46,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 04:20:46,084 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash -977644340, now seen corresponding path program 1 times [2021-06-05 04:20:46,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:46,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015896567] [2021-06-05 04:20:46,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:46,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015896567] [2021-06-05 04:20:46,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015896567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642228663] [2021-06-05 04:20:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:46,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:46,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 04:20:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:46,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642228663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:46,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:46,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 04:20:46,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241129136] [2021-06-05 04:20:46,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:46,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:46,199 INFO L87 Difference]: Start difference. First operand 1246 states and 4944 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:46,269 INFO L93 Difference]: Finished difference Result 2518 states and 9792 transitions. [2021-06-05 04:20:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:46,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:46,284 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 04:20:46,284 INFO L226 Difference]: Without dead ends: 2518 [2021-06-05 04:20:46,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-06-05 04:20:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1535. [2021-06-05 04:20:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 4.046284224250326) internal successors, (6207), 1534 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 6207 transitions. [2021-06-05 04:20:46,343 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 6207 transitions. Word has length 22 [2021-06-05 04:20:46,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:46,343 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 6207 transitions. [2021-06-05 04:20:46,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 6207 transitions. [2021-06-05 04:20:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:46,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:46,349 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:46,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:46,567 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1634054805, now seen corresponding path program 1 times [2021-06-05 04:20:46,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:46,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152920278] [2021-06-05 04:20:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:46,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:46,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152920278] [2021-06-05 04:20:46,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152920278] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:46,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:46,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:20:46,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448010642] [2021-06-05 04:20:46,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:46,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:46,607 INFO L87 Difference]: Start difference. First operand 1535 states and 6207 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:46,663 INFO L93 Difference]: Finished difference Result 2143 states and 8381 transitions. [2021-06-05 04:20:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:46,673 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 04:20:46,674 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 04:20:46,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:46,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 04:20:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1600. [2021-06-05 04:20:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.9987492182614135) internal successors, (6394), 1599 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 6394 transitions. [2021-06-05 04:20:46,749 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 6394 transitions. Word has length 22 [2021-06-05 04:20:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:46,749 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 6394 transitions. [2021-06-05 04:20:46,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 6394 transitions. [2021-06-05 04:20:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:46,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:46,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:46,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:20:46,754 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:46,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2015216124, now seen corresponding path program 1 times [2021-06-05 04:20:46,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:46,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304941483] [2021-06-05 04:20:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:46,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304941483] [2021-06-05 04:20:46,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304941483] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:46,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:46,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:20:46,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623076507] [2021-06-05 04:20:46,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:46,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:46,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:46,786 INFO L87 Difference]: Start difference. First operand 1600 states and 6394 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:46,843 INFO L93 Difference]: Finished difference Result 2353 states and 9126 transitions. [2021-06-05 04:20:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:46,855 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 04:20:46,855 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 04:20:46,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 04:20:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1670. [2021-06-05 04:20:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.9622528460155784) internal successors, (6613), 1669 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 6613 transitions. [2021-06-05 04:20:46,902 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 6613 transitions. Word has length 22 [2021-06-05 04:20:46,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:46,902 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 6613 transitions. [2021-06-05 04:20:46,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 6613 transitions. [2021-06-05 04:20:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:46,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:46,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:46,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:20:46,906 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1699108399, now seen corresponding path program 2 times [2021-06-05 04:20:46,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:46,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061046439] [2021-06-05 04:20:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:46,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:46,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061046439] [2021-06-05 04:20:46,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061046439] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:46,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:46,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:20:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98257102] [2021-06-05 04:20:46,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:46,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:46,950 INFO L87 Difference]: Start difference. First operand 1670 states and 6613 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:47,013 INFO L93 Difference]: Finished difference Result 2314 states and 9023 transitions. [2021-06-05 04:20:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:47,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:47,065 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 04:20:47,065 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 04:20:47,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:47,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 04:20:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1847. [2021-06-05 04:20:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 3.978331527627302) internal successors, (7344), 1846 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 7344 transitions. [2021-06-05 04:20:47,130 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 7344 transitions. Word has length 22 [2021-06-05 04:20:47,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:47,130 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 7344 transitions. [2021-06-05 04:20:47,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 7344 transitions. [2021-06-05 04:20:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:47,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:47,134 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:47,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:20:47,134 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:47,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1727272710, now seen corresponding path program 2 times [2021-06-05 04:20:47,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:47,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85810973] [2021-06-05 04:20:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:47,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:47,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85810973] [2021-06-05 04:20:47,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85810973] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:47,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:47,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:20:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863015484] [2021-06-05 04:20:47,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:47,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:47,170 INFO L87 Difference]: Start difference. First operand 1847 states and 7344 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:47,219 INFO L93 Difference]: Finished difference Result 2315 states and 8927 transitions. [2021-06-05 04:20:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:47,229 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 04:20:47,229 INFO L226 Difference]: Without dead ends: 2297 [2021-06-05 04:20:47,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-05 04:20:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1919. [2021-06-05 04:20:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.946298227320125) internal successors, (7569), 1918 states have internal predecessors, (7569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 7569 transitions. [2021-06-05 04:20:47,281 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 7569 transitions. Word has length 22 [2021-06-05 04:20:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:47,281 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 7569 transitions. [2021-06-05 04:20:47,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 7569 transitions. [2021-06-05 04:20:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:47,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:47,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:47,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 04:20:47,285 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:47,286 INFO L82 PathProgramCache]: Analyzing trace with hash -264076448, now seen corresponding path program 2 times [2021-06-05 04:20:47,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:47,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130910986] [2021-06-05 04:20:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:47,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:47,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130910986] [2021-06-05 04:20:47,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130910986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:47,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:47,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:20:47,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794664208] [2021-06-05 04:20:47,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:47,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:47,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:47,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:47,323 INFO L87 Difference]: Start difference. First operand 1919 states and 7569 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:47,371 INFO L93 Difference]: Finished difference Result 2879 states and 11172 transitions. [2021-06-05 04:20:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:47,378 INFO L225 Difference]: With dead ends: 2879 [2021-06-05 04:20:47,379 INFO L226 Difference]: Without dead ends: 2879 [2021-06-05 04:20:47,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-06-05 04:20:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2176. [2021-06-05 04:20:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.964137931034483) internal successors, (8622), 2175 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 8622 transitions. [2021-06-05 04:20:47,434 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 8622 transitions. Word has length 22 [2021-06-05 04:20:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:47,436 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 8622 transitions. [2021-06-05 04:20:47,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 8622 transitions. [2021-06-05 04:20:47,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:20:47,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:47,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:47,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 04:20:47,441 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:47,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1299303677, now seen corresponding path program 2 times [2021-06-05 04:20:47,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:47,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824280440] [2021-06-05 04:20:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:47,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:47,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824280440] [2021-06-05 04:20:47,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824280440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:47,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:47,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:20:47,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421665894] [2021-06-05 04:20:47,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:20:47,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:47,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:20:47,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:20:47,465 INFO L87 Difference]: Start difference. First operand 2176 states and 8622 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:47,516 INFO L93 Difference]: Finished difference Result 2839 states and 10862 transitions. [2021-06-05 04:20:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:20:47,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:47,524 INFO L225 Difference]: With dead ends: 2839 [2021-06-05 04:20:47,524 INFO L226 Difference]: Without dead ends: 2811 [2021-06-05 04:20:47,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-06-05 04:20:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2291. [2021-06-05 04:20:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 3.9375545851528386) internal successors, (9017), 2290 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9017 transitions. [2021-06-05 04:20:47,574 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9017 transitions. Word has length 22 [2021-06-05 04:20:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:47,574 INFO L482 AbstractCegarLoop]: Abstraction has 2291 states and 9017 transitions. [2021-06-05 04:20:47,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9017 transitions. [2021-06-05 04:20:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:20:47,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:47,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:47,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 04:20:47,583 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2040256713, now seen corresponding path program 1 times [2021-06-05 04:20:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:47,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890860082] [2021-06-05 04:20:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:47,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:47,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890860082] [2021-06-05 04:20:47,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890860082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:47,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280131470] [2021-06-05 04:20:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:20:47,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:47,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280131470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:47,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:47,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 04:20:47,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934914535] [2021-06-05 04:20:47,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:20:47,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:47,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:20:47,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:20:47,917 INFO L87 Difference]: Start difference. First operand 2291 states and 9017 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:48,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:48,096 INFO L93 Difference]: Finished difference Result 3791 states and 14505 transitions. [2021-06-05 04:20:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:20:48,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:20:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:48,107 INFO L225 Difference]: With dead ends: 3791 [2021-06-05 04:20:48,107 INFO L226 Difference]: Without dead ends: 3655 [2021-06-05 04:20:48,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:20:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2021-06-05 04:20:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2656. [2021-06-05 04:20:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 3.9450094161958567) internal successors, (10474), 2655 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 10474 transitions. [2021-06-05 04:20:48,177 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 10474 transitions. Word has length 25 [2021-06-05 04:20:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:48,178 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 10474 transitions. [2021-06-05 04:20:48,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 10474 transitions. [2021-06-05 04:20:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:20:48,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:48,184 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:48,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 04:20:48,397 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -993904687, now seen corresponding path program 2 times [2021-06-05 04:20:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:48,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898431878] [2021-06-05 04:20:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:20:48,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:48,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898431878] [2021-06-05 04:20:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898431878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:48,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762390158] [2021-06-05 04:20:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:48,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:48,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:20:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:48,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:48,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762390158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:48,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:48,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 04:20:48,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919036887] [2021-06-05 04:20:48,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:20:48,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:48,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:20:48,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:20:48,696 INFO L87 Difference]: Start difference. First operand 2656 states and 10474 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:48,883 INFO L93 Difference]: Finished difference Result 4004 states and 15422 transitions. [2021-06-05 04:20:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:20:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:20:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:48,894 INFO L225 Difference]: With dead ends: 4004 [2021-06-05 04:20:48,894 INFO L226 Difference]: Without dead ends: 3868 [2021-06-05 04:20:48,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:20:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-06-05 04:20:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 2991. [2021-06-05 04:20:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.9638795986622073) internal successors, (11852), 2990 states have internal predecessors, (11852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11852 transitions. [2021-06-05 04:20:48,960 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11852 transitions. Word has length 25 [2021-06-05 04:20:48,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:48,960 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 11852 transitions. [2021-06-05 04:20:48,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11852 transitions. [2021-06-05 04:20:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:20:48,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:48,966 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:49,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:49,181 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 455681823, now seen corresponding path program 3 times [2021-06-05 04:20:49,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:49,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338141880] [2021-06-05 04:20:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:20:49,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:49,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338141880] [2021-06-05 04:20:49,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338141880] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:49,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:49,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:20:49,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331707225] [2021-06-05 04:20:49,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:20:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:20:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:49,220 INFO L87 Difference]: Start difference. First operand 2991 states and 11852 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:49,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:49,335 INFO L93 Difference]: Finished difference Result 4207 states and 16326 transitions. [2021-06-05 04:20:49,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:20:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:49,348 INFO L225 Difference]: With dead ends: 4207 [2021-06-05 04:20:49,349 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 04:20:49,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 04:20:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3438. [2021-06-05 04:20:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.9793424498108814) internal successors, (13677), 3437 states have internal predecessors, (13677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13677 transitions. [2021-06-05 04:20:49,427 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13677 transitions. Word has length 25 [2021-06-05 04:20:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:49,427 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13677 transitions. [2021-06-05 04:20:49,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13677 transitions. [2021-06-05 04:20:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:20:49,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:49,434 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:49,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 04:20:49,434 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash -91124313, now seen corresponding path program 1 times [2021-06-05 04:20:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:49,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386686185] [2021-06-05 04:20:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:49,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386686185] [2021-06-05 04:20:49,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386686185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:49,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896544713] [2021-06-05 04:20:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:20:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:49,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896544713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:49,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:49,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 04:20:49,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685004400] [2021-06-05 04:20:49,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:20:49,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:49,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:20:49,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:20:49,633 INFO L87 Difference]: Start difference. First operand 3438 states and 13677 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:49,815 INFO L93 Difference]: Finished difference Result 4729 states and 18310 transitions. [2021-06-05 04:20:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:20:49,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:20:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:49,827 INFO L225 Difference]: With dead ends: 4729 [2021-06-05 04:20:49,827 INFO L226 Difference]: Without dead ends: 4627 [2021-06-05 04:20:49,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:20:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-06-05 04:20:49,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3870. [2021-06-05 04:20:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3869 states have (on average 3.958904109589041) internal successors, (15317), 3869 states have internal predecessors, (15317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 15317 transitions. [2021-06-05 04:20:49,911 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 15317 transitions. Word has length 25 [2021-06-05 04:20:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:49,911 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 15317 transitions. [2021-06-05 04:20:49,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 15317 transitions. [2021-06-05 04:20:49,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:20:49,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:49,918 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:50,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 04:20:50,133 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1468953723, now seen corresponding path program 2 times [2021-06-05 04:20:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:50,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889908173] [2021-06-05 04:20:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:20:50,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:50,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889908173] [2021-06-05 04:20:50,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889908173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:50,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725690973] [2021-06-05 04:20:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:20:50,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:50,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:20:50,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:50,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725690973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:50,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:50,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 04:20:50,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142939510] [2021-06-05 04:20:50,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:20:50,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:50,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:20:50,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:20:50,375 INFO L87 Difference]: Start difference. First operand 3870 states and 15317 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:50,604 INFO L93 Difference]: Finished difference Result 4946 states and 19222 transitions. [2021-06-05 04:20:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:20:50,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:20:50,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:50,615 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 04:20:50,616 INFO L226 Difference]: Without dead ends: 4844 [2021-06-05 04:20:50,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:20:50,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4844 states. [2021-06-05 04:20:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4844 to 4195. [2021-06-05 04:20:50,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4195 states, 4194 states have (on average 3.966618979494516) internal successors, (16636), 4194 states have internal predecessors, (16636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 16636 transitions. [2021-06-05 04:20:50,698 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 16636 transitions. Word has length 25 [2021-06-05 04:20:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:50,698 INFO L482 AbstractCegarLoop]: Abstraction has 4195 states and 16636 transitions. [2021-06-05 04:20:50,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 16636 transitions. [2021-06-05 04:20:50,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:20:50,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:50,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:50,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:50,925 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash -466013585, now seen corresponding path program 3 times [2021-06-05 04:20:50,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:50,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545763167] [2021-06-05 04:20:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:20:50,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545763167] [2021-06-05 04:20:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545763167] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:20:50,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:20:50,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:20:50,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235287809] [2021-06-05 04:20:50,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:20:50,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:20:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:50,968 INFO L87 Difference]: Start difference. First operand 4195 states and 16636 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:51,069 INFO L93 Difference]: Finished difference Result 5169 states and 20167 transitions. [2021-06-05 04:20:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:20:51,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:20:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:51,081 INFO L225 Difference]: With dead ends: 5169 [2021-06-05 04:20:51,081 INFO L226 Difference]: Without dead ends: 5118 [2021-06-05 04:20:51,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:20:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-06-05 04:20:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4611. [2021-06-05 04:20:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 3.9731019522776574) internal successors, (18316), 4610 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 18316 transitions. [2021-06-05 04:20:51,167 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 18316 transitions. Word has length 25 [2021-06-05 04:20:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:51,167 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 18316 transitions. [2021-06-05 04:20:51,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:51,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 18316 transitions. [2021-06-05 04:20:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:51,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:51,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:51,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 04:20:51,176 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1201507300, now seen corresponding path program 4 times [2021-06-05 04:20:51,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:51,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127388008] [2021-06-05 04:20:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:51,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127388008] [2021-06-05 04:20:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127388008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455124136] [2021-06-05 04:20:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:51,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:51,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:51,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455124136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:51,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:51,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:20:51,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69478712] [2021-06-05 04:20:51,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:20:51,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:20:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:20:51,336 INFO L87 Difference]: Start difference. First operand 4611 states and 18316 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:52,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:52,143 INFO L93 Difference]: Finished difference Result 11402 states and 44327 transitions. [2021-06-05 04:20:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:20:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:52,166 INFO L225 Difference]: With dead ends: 11402 [2021-06-05 04:20:52,167 INFO L226 Difference]: Without dead ends: 11402 [2021-06-05 04:20:52,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:20:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-05 04:20:52,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 5821. [2021-06-05 04:20:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 4.016151202749141) internal successors, (23374), 5820 states have internal predecessors, (23374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 23374 transitions. [2021-06-05 04:20:52,314 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 23374 transitions. Word has length 28 [2021-06-05 04:20:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:52,314 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 23374 transitions. [2021-06-05 04:20:52,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 23374 transitions. [2021-06-05 04:20:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:52,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:52,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:52,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 04:20:52,537 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1181914093, now seen corresponding path program 5 times [2021-06-05 04:20:52,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:52,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153823915] [2021-06-05 04:20:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:52,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:52,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153823915] [2021-06-05 04:20:52,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153823915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:52,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394890554] [2021-06-05 04:20:52,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:52,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:20:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:52,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:52,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:52,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394890554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:52,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:52,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:20:52,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024283131] [2021-06-05 04:20:52,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:20:52,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:20:52,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:20:52,712 INFO L87 Difference]: Start difference. First operand 5821 states and 23374 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:53,324 INFO L93 Difference]: Finished difference Result 15383 states and 58771 transitions. [2021-06-05 04:20:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:20:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:53,362 INFO L225 Difference]: With dead ends: 15383 [2021-06-05 04:20:53,362 INFO L226 Difference]: Without dead ends: 15203 [2021-06-05 04:20:53,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:20:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15203 states. [2021-06-05 04:20:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15203 to 8319. [2021-06-05 04:20:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.118177446501563) internal successors, (34255), 8318 states have internal predecessors, (34255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34255 transitions. [2021-06-05 04:20:53,603 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34255 transitions. Word has length 28 [2021-06-05 04:20:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:53,603 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34255 transitions. [2021-06-05 04:20:53,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34255 transitions. [2021-06-05 04:20:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:53,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:53,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:53,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 04:20:53,839 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1237707597, now seen corresponding path program 6 times [2021-06-05 04:20:53,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:53,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835791035] [2021-06-05 04:20:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:53,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835791035] [2021-06-05 04:20:53,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835791035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800630453] [2021-06-05 04:20:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:53,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:20:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:53,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:53,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:54,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800630453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:54,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:54,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:20:54,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788450926] [2021-06-05 04:20:54,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:20:54,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:54,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:20:54,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:20:54,099 INFO L87 Difference]: Start difference. First operand 8319 states and 34255 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:54,503 INFO L93 Difference]: Finished difference Result 16184 states and 62633 transitions. [2021-06-05 04:20:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:20:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:54,543 INFO L225 Difference]: With dead ends: 16184 [2021-06-05 04:20:54,543 INFO L226 Difference]: Without dead ends: 16184 [2021-06-05 04:20:54,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:20:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-06-05 04:20:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 8319. [2021-06-05 04:20:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8319 states, 8318 states have (on average 4.099062274585237) internal successors, (34096), 8318 states have internal predecessors, (34096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 34096 transitions. [2021-06-05 04:20:54,794 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 34096 transitions. Word has length 28 [2021-06-05 04:20:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:54,794 INFO L482 AbstractCegarLoop]: Abstraction has 8319 states and 34096 transitions. [2021-06-05 04:20:54,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:54,795 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 34096 transitions. [2021-06-05 04:20:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:54,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:54,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:55,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 04:20:55,033 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1493879574, now seen corresponding path program 7 times [2021-06-05 04:20:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:55,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590040414] [2021-06-05 04:20:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:55,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:55,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590040414] [2021-06-05 04:20:55,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590040414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:55,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952279007] [2021-06-05 04:20:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:55,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:55,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:55,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952279007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:55,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:55,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:20:55,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075096089] [2021-06-05 04:20:55,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:20:55,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:55,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:20:55,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:20:55,183 INFO L87 Difference]: Start difference. First operand 8319 states and 34096 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:55,462 INFO L93 Difference]: Finished difference Result 10083 states and 39959 transitions. [2021-06-05 04:20:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:20:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:55,484 INFO L225 Difference]: With dead ends: 10083 [2021-06-05 04:20:55,484 INFO L226 Difference]: Without dead ends: 10027 [2021-06-05 04:20:55,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:20:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10027 states. [2021-06-05 04:20:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10027 to 8326. [2021-06-05 04:20:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 4.095975975975976) internal successors, (34099), 8325 states have internal predecessors, (34099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 34099 transitions. [2021-06-05 04:20:55,660 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 34099 transitions. Word has length 28 [2021-06-05 04:20:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:55,660 INFO L482 AbstractCegarLoop]: Abstraction has 8326 states and 34099 transitions. [2021-06-05 04:20:55,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 34099 transitions. [2021-06-05 04:20:55,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:55,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:55,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:55,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:55,875 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1541673924, now seen corresponding path program 8 times [2021-06-05 04:20:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:55,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922471263] [2021-06-05 04:20:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:20:55,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:55,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922471263] [2021-06-05 04:20:55,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922471263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:55,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928634657] [2021-06-05 04:20:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:55,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:20:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928634657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:55,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:55,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:20:55,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976528106] [2021-06-05 04:20:55,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:20:55,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:55,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:20:55,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:20:55,997 INFO L87 Difference]: Start difference. First operand 8326 states and 34099 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:56,456 INFO L93 Difference]: Finished difference Result 17529 states and 67736 transitions. [2021-06-05 04:20:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:20:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:56,497 INFO L225 Difference]: With dead ends: 17529 [2021-06-05 04:20:56,497 INFO L226 Difference]: Without dead ends: 17529 [2021-06-05 04:20:56,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:20:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17529 states. [2021-06-05 04:20:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17529 to 8432. [2021-06-05 04:20:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.087296880559839) internal successors, (34460), 8431 states have internal predecessors, (34460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34460 transitions. [2021-06-05 04:20:56,778 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34460 transitions. Word has length 28 [2021-06-05 04:20:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:56,778 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34460 transitions. [2021-06-05 04:20:56,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34460 transitions. [2021-06-05 04:20:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:56,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:56,792 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:56,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:56,993 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash 182486291, now seen corresponding path program 9 times [2021-06-05 04:20:56,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:56,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97288896] [2021-06-05 04:20:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:20:57,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97288896] [2021-06-05 04:20:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97288896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166156521] [2021-06-05 04:20:57,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:57,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:20:57,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:57,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166156521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:57,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:57,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:20:57,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917457747] [2021-06-05 04:20:57,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:20:57,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:20:57,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:20:57,198 INFO L87 Difference]: Start difference. First operand 8432 states and 34460 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:57,738 INFO L93 Difference]: Finished difference Result 15647 states and 60285 transitions. [2021-06-05 04:20:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:20:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:57,775 INFO L225 Difference]: With dead ends: 15647 [2021-06-05 04:20:57,775 INFO L226 Difference]: Without dead ends: 15587 [2021-06-05 04:20:57,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:20:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15587 states. [2021-06-05 04:20:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15587 to 8432. [2021-06-05 04:20:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8432 states, 8431 states have (on average 4.084924682718539) internal successors, (34440), 8431 states have internal predecessors, (34440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8432 states to 8432 states and 34440 transitions. [2021-06-05 04:20:58,012 INFO L78 Accepts]: Start accepts. Automaton has 8432 states and 34440 transitions. Word has length 28 [2021-06-05 04:20:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:58,012 INFO L482 AbstractCegarLoop]: Abstraction has 8432 states and 34440 transitions. [2021-06-05 04:20:58,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8432 states and 34440 transitions. [2021-06-05 04:20:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:58,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:58,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:58,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:58,227 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:58,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:58,228 INFO L82 PathProgramCache]: Analyzing trace with hash -789657513, now seen corresponding path program 10 times [2021-06-05 04:20:58,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:58,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111281582] [2021-06-05 04:20:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:58,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:58,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111281582] [2021-06-05 04:20:58,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111281582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:58,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062962570] [2021-06-05 04:20:58,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:58,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:20:58,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:58,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062962570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:58,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:58,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:20:58,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776512565] [2021-06-05 04:20:58,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:20:58,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:58,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:20:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:20:58,376 INFO L87 Difference]: Start difference. First operand 8432 states and 34440 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:20:58,994 INFO L93 Difference]: Finished difference Result 18798 states and 72632 transitions. [2021-06-05 04:20:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:20:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:20:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:20:59,039 INFO L225 Difference]: With dead ends: 18798 [2021-06-05 04:20:59,039 INFO L226 Difference]: Without dead ends: 18798 [2021-06-05 04:20:59,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:20:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18798 states. [2021-06-05 04:20:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18798 to 8538. [2021-06-05 04:20:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.08269884034204) internal successors, (34854), 8537 states have internal predecessors, (34854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34854 transitions. [2021-06-05 04:20:59,341 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34854 transitions. Word has length 28 [2021-06-05 04:20:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:20:59,341 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34854 transitions. [2021-06-05 04:20:59,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:20:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34854 transitions. [2021-06-05 04:20:59,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:20:59,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:20:59,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:20:59,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 04:20:59,560 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:20:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:20:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash 773722612, now seen corresponding path program 11 times [2021-06-05 04:20:59,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:20:59,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468160070] [2021-06-05 04:20:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:20:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:20:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:59,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:20:59,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468160070] [2021-06-05 04:20:59,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468160070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:59,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298412014] [2021-06-05 04:20:59,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:20:59,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:20:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:20:59,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:20:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:20:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:20:59,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298412014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:20:59,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:20:59,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:20:59,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042642908] [2021-06-05 04:20:59,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:20:59,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:20:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:20:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:20:59,753 INFO L87 Difference]: Start difference. First operand 8538 states and 34854 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:00,141 INFO L93 Difference]: Finished difference Result 14070 states and 54143 transitions. [2021-06-05 04:21:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:00,214 INFO L225 Difference]: With dead ends: 14070 [2021-06-05 04:21:00,214 INFO L226 Difference]: Without dead ends: 14014 [2021-06-05 04:21:00,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:21:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14014 states. [2021-06-05 04:21:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14014 to 8538. [2021-06-05 04:21:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8538 states, 8537 states have (on average 4.080356096989575) internal successors, (34834), 8537 states have internal predecessors, (34834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8538 states to 8538 states and 34834 transitions. [2021-06-05 04:21:00,385 INFO L78 Accepts]: Start accepts. Automaton has 8538 states and 34834 transitions. Word has length 28 [2021-06-05 04:21:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:00,385 INFO L482 AbstractCegarLoop]: Abstraction has 8538 states and 34834 transitions. [2021-06-05 04:21:00,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 8538 states and 34834 transitions. [2021-06-05 04:21:00,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:00,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:00,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:00,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:00,612 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:00,612 INFO L82 PathProgramCache]: Analyzing trace with hash 47154117, now seen corresponding path program 12 times [2021-06-05 04:21:00,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:00,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960514143] [2021-06-05 04:21:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:00,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:00,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960514143] [2021-06-05 04:21:00,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960514143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:00,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290710672] [2021-06-05 04:21:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:00,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:21:00,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:00,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290710672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:00,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:00,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:00,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748746051] [2021-06-05 04:21:00,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:00,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:00,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:00,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:00,772 INFO L87 Difference]: Start difference. First operand 8538 states and 34834 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:01,559 INFO L93 Difference]: Finished difference Result 18926 states and 73169 transitions. [2021-06-05 04:21:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:01,603 INFO L225 Difference]: With dead ends: 18926 [2021-06-05 04:21:01,603 INFO L226 Difference]: Without dead ends: 18926 [2021-06-05 04:21:01,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:01,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18926 states. [2021-06-05 04:21:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18926 to 8689. [2021-06-05 04:21:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 8688 states have (on average 4.058586556169429) internal successors, (35261), 8688 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 35261 transitions. [2021-06-05 04:21:01,940 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 35261 transitions. Word has length 28 [2021-06-05 04:21:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:01,941 INFO L482 AbstractCegarLoop]: Abstraction has 8689 states and 35261 transitions. [2021-06-05 04:21:01,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 35261 transitions. [2021-06-05 04:21:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:01,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:01,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:02,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 04:21:02,175 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:02,175 INFO L82 PathProgramCache]: Analyzing trace with hash 407339324, now seen corresponding path program 13 times [2021-06-05 04:21:02,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:02,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653357139] [2021-06-05 04:21:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:02,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653357139] [2021-06-05 04:21:02,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653357139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:02,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370736320] [2021-06-05 04:21:02,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:02,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370736320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:02,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:02,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002526826] [2021-06-05 04:21:02,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:02,326 INFO L87 Difference]: Start difference. First operand 8689 states and 35261 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:02,939 INFO L93 Difference]: Finished difference Result 12612 states and 48542 transitions. [2021-06-05 04:21:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:02,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:02,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:02,965 INFO L225 Difference]: With dead ends: 12612 [2021-06-05 04:21:02,965 INFO L226 Difference]: Without dead ends: 12556 [2021-06-05 04:21:02,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:21:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12556 states. [2021-06-05 04:21:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12556 to 8811. [2021-06-05 04:21:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.050397275822928) internal successors, (35684), 8810 states have internal predecessors, (35684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35684 transitions. [2021-06-05 04:21:03,141 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35684 transitions. Word has length 28 [2021-06-05 04:21:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:03,141 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35684 transitions. [2021-06-05 04:21:03,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35684 transitions. [2021-06-05 04:21:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:03,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:03,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:03,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:03,356 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:03,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1488851502, now seen corresponding path program 14 times [2021-06-05 04:21:03,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:03,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687340963] [2021-06-05 04:21:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:03,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:03,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687340963] [2021-06-05 04:21:03,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687340963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:03,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973381427] [2021-06-05 04:21:03,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:03,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:03,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:03,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:03,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973381427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:03,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:03,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570302565] [2021-06-05 04:21:03,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:03,491 INFO L87 Difference]: Start difference. First operand 8811 states and 35684 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:03,871 INFO L93 Difference]: Finished difference Result 16530 states and 63291 transitions. [2021-06-05 04:21:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:21:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:03,909 INFO L225 Difference]: With dead ends: 16530 [2021-06-05 04:21:03,909 INFO L226 Difference]: Without dead ends: 16530 [2021-06-05 04:21:03,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:21:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-05 04:21:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 8811. [2021-06-05 04:21:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.044381384790011) internal successors, (35631), 8810 states have internal predecessors, (35631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35631 transitions. [2021-06-05 04:21:04,110 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35631 transitions. Word has length 28 [2021-06-05 04:21:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:04,111 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35631 transitions. [2021-06-05 04:21:04,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35631 transitions. [2021-06-05 04:21:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:04,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:04,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:04,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 04:21:04,325 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:04,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1081955579, now seen corresponding path program 15 times [2021-06-05 04:21:04,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:04,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624341480] [2021-06-05 04:21:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:04,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:04,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624341480] [2021-06-05 04:21:04,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624341480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:04,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641439661] [2021-06-05 04:21:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:04,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:21:04,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641439661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:04,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:04,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:04,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560323405] [2021-06-05 04:21:04,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:04,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:04,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:04,456 INFO L87 Difference]: Start difference. First operand 8811 states and 35631 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:04,801 INFO L93 Difference]: Finished difference Result 11652 states and 45517 transitions. [2021-06-05 04:21:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:21:04,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:04,825 INFO L225 Difference]: With dead ends: 11652 [2021-06-05 04:21:04,825 INFO L226 Difference]: Without dead ends: 11632 [2021-06-05 04:21:04,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:21:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11632 states. [2021-06-05 04:21:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11632 to 8811. [2021-06-05 04:21:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8811 states, 8810 states have (on average 4.043246311010216) internal successors, (35621), 8810 states have internal predecessors, (35621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8811 states to 8811 states and 35621 transitions. [2021-06-05 04:21:04,983 INFO L78 Accepts]: Start accepts. Automaton has 8811 states and 35621 transitions. Word has length 28 [2021-06-05 04:21:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:04,983 INFO L482 AbstractCegarLoop]: Abstraction has 8811 states and 35621 transitions. [2021-06-05 04:21:04,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 8811 states and 35621 transitions. [2021-06-05 04:21:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:04,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:04,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:05,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 04:21:05,198 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2054099383, now seen corresponding path program 16 times [2021-06-05 04:21:05,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:05,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715806042] [2021-06-05 04:21:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:05,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715806042] [2021-06-05 04:21:05,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715806042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525484819] [2021-06-05 04:21:05,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:05,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:21:05,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:05,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525484819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:05,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:05,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:05,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695856603] [2021-06-05 04:21:05,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:05,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:05,321 INFO L87 Difference]: Start difference. First operand 8811 states and 35621 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:05,708 INFO L93 Difference]: Finished difference Result 13573 states and 53112 transitions. [2021-06-05 04:21:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:21:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:05,739 INFO L225 Difference]: With dead ends: 13573 [2021-06-05 04:21:05,739 INFO L226 Difference]: Without dead ends: 13573 [2021-06-05 04:21:05,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:21:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2021-06-05 04:21:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 8864. [2021-06-05 04:21:05,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.042423558614464) internal successors, (35828), 8863 states have internal predecessors, (35828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35828 transitions. [2021-06-05 04:21:06,007 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35828 transitions. Word has length 28 [2021-06-05 04:21:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:06,007 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35828 transitions. [2021-06-05 04:21:06,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35828 transitions. [2021-06-05 04:21:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:06,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:06,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:06,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 04:21:06,222 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash -490719258, now seen corresponding path program 17 times [2021-06-05 04:21:06,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:06,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674130738] [2021-06-05 04:21:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:06,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:06,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674130738] [2021-06-05 04:21:06,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674130738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:06,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756562915] [2021-06-05 04:21:06,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:06,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:21:06,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:06,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:06,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756562915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:06,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:06,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:06,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202836226] [2021-06-05 04:21:06,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:06,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:06,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:06,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:06,347 INFO L87 Difference]: Start difference. First operand 8864 states and 35828 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:06,717 INFO L93 Difference]: Finished difference Result 14465 states and 55050 transitions. [2021-06-05 04:21:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:21:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:06,751 INFO L225 Difference]: With dead ends: 14465 [2021-06-05 04:21:06,751 INFO L226 Difference]: Without dead ends: 14437 [2021-06-05 04:21:06,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:21:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-06-05 04:21:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 8864. [2021-06-05 04:21:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.0412952724811015) internal successors, (35818), 8863 states have internal predecessors, (35818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 35818 transitions. [2021-06-05 04:21:06,991 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 35818 transitions. Word has length 28 [2021-06-05 04:21:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:06,991 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 35818 transitions. [2021-06-05 04:21:06,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 35818 transitions. [2021-06-05 04:21:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:07,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:07,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:07,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 04:21:07,217 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1217287753, now seen corresponding path program 18 times [2021-06-05 04:21:07,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:07,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644858952] [2021-06-05 04:21:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:07,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:07,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644858952] [2021-06-05 04:21:07,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644858952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:07,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909946035] [2021-06-05 04:21:07,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:07,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:21:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:07,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909946035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:07,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:07,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 04:21:07,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021445187] [2021-06-05 04:21:07,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:07,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:07,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:07,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:07,354 INFO L87 Difference]: Start difference. First operand 8864 states and 35818 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:08,030 INFO L93 Difference]: Finished difference Result 17059 states and 67264 transitions. [2021-06-05 04:21:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:21:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:08,073 INFO L225 Difference]: With dead ends: 17059 [2021-06-05 04:21:08,073 INFO L226 Difference]: Without dead ends: 17059 [2021-06-05 04:21:08,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:21:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17059 states. [2021-06-05 04:21:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17059 to 8917. [2021-06-05 04:21:08,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.040489008524002) internal successors, (36025), 8916 states have internal predecessors, (36025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36025 transitions. [2021-06-05 04:21:08,317 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36025 transitions. Word has length 28 [2021-06-05 04:21:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:08,317 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36025 transitions. [2021-06-05 04:21:08,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36025 transitions. [2021-06-05 04:21:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:08,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:08,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:08,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:08,532 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:08,533 INFO L82 PathProgramCache]: Analyzing trace with hash -857102546, now seen corresponding path program 19 times [2021-06-05 04:21:08,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:08,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582182349] [2021-06-05 04:21:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:08,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:08,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582182349] [2021-06-05 04:21:08,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582182349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:08,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804711829] [2021-06-05 04:21:08,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:08,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:08,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804711829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:08,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:08,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 04:21:08,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980433070] [2021-06-05 04:21:08,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:08,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:08,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:08,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:08,666 INFO L87 Difference]: Start difference. First operand 8917 states and 36025 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:09,187 INFO L93 Difference]: Finished difference Result 17336 states and 65142 transitions. [2021-06-05 04:21:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:09,227 INFO L225 Difference]: With dead ends: 17336 [2021-06-05 04:21:09,227 INFO L226 Difference]: Without dead ends: 17224 [2021-06-05 04:21:09,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17224 states. [2021-06-05 04:21:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17224 to 8917. [2021-06-05 04:21:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 4.039367429340511) internal successors, (36015), 8916 states have internal predecessors, (36015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 36015 transitions. [2021-06-05 04:21:09,484 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 36015 transitions. Word has length 28 [2021-06-05 04:21:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:09,484 INFO L482 AbstractCegarLoop]: Abstraction has 8917 states and 36015 transitions. [2021-06-05 04:21:09,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 36015 transitions. [2021-06-05 04:21:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:09,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:09,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:09,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:09,705 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1623161651, now seen corresponding path program 20 times [2021-06-05 04:21:09,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:09,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142021366] [2021-06-05 04:21:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:09,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:09,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142021366] [2021-06-05 04:21:09,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142021366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:09,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501443388] [2021-06-05 04:21:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:09,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:09,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:09,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501443388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:09,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:09,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:21:09,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179770350] [2021-06-05 04:21:09,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:09,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:09,838 INFO L87 Difference]: Start difference. First operand 8917 states and 36015 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:10,539 INFO L93 Difference]: Finished difference Result 13676 states and 54158 transitions. [2021-06-05 04:21:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:21:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:10,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:10,574 INFO L225 Difference]: With dead ends: 13676 [2021-06-05 04:21:10,574 INFO L226 Difference]: Without dead ends: 13676 [2021-06-05 04:21:10,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:21:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13676 states. [2021-06-05 04:21:10,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13676 to 9131. [2021-06-05 04:21:10,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 4.022562979189485) internal successors, (36726), 9130 states have internal predecessors, (36726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 36726 transitions. [2021-06-05 04:21:10,791 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 36726 transitions. Word has length 28 [2021-06-05 04:21:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:10,792 INFO L482 AbstractCegarLoop]: Abstraction has 9131 states and 36726 transitions. [2021-06-05 04:21:10,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:10,792 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 36726 transitions. [2021-06-05 04:21:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:10,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:10,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:11,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 04:21:11,007 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash -331624474, now seen corresponding path program 21 times [2021-06-05 04:21:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:11,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13779830] [2021-06-05 04:21:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:11,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13779830] [2021-06-05 04:21:11,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13779830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:11,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795748936] [2021-06-05 04:21:11,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:11,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:21:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795748936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:11,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:11,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:21:11,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70301402] [2021-06-05 04:21:11,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:11,141 INFO L87 Difference]: Start difference. First operand 9131 states and 36726 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:11,661 INFO L93 Difference]: Finished difference Result 15155 states and 56901 transitions. [2021-06-05 04:21:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:21:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:11,695 INFO L225 Difference]: With dead ends: 15155 [2021-06-05 04:21:11,695 INFO L226 Difference]: Without dead ends: 15043 [2021-06-05 04:21:11,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:21:11,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15043 states. [2021-06-05 04:21:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15043 to 9347. [2021-06-05 04:21:11,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9346 states have (on average 4.008238818745988) internal successors, (37461), 9346 states have internal predecessors, (37461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 37461 transitions. [2021-06-05 04:21:11,895 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 37461 transitions. Word has length 28 [2021-06-05 04:21:11,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:11,895 INFO L482 AbstractCegarLoop]: Abstraction has 9347 states and 37461 transitions. [2021-06-05 04:21:11,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 37461 transitions. [2021-06-05 04:21:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:11,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:11,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:12,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:12,110 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:12,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1738838736, now seen corresponding path program 22 times [2021-06-05 04:21:12,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:12,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366205593] [2021-06-05 04:21:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:12,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366205593] [2021-06-05 04:21:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366205593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076346134] [2021-06-05 04:21:12,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:12,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:21:12,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:12,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:12,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076346134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:12,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:12,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:12,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374003747] [2021-06-05 04:21:12,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:12,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:12,237 INFO L87 Difference]: Start difference. First operand 9347 states and 37461 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:12,863 INFO L93 Difference]: Finished difference Result 16354 states and 63144 transitions. [2021-06-05 04:21:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:12,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:12,899 INFO L225 Difference]: With dead ends: 16354 [2021-06-05 04:21:12,900 INFO L226 Difference]: Without dead ends: 16354 [2021-06-05 04:21:12,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16354 states. [2021-06-05 04:21:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16354 to 9241. [2021-06-05 04:21:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9241 states, 9240 states have (on average 3.997943722943723) internal successors, (36941), 9240 states have internal predecessors, (36941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9241 states to 9241 states and 36941 transitions. [2021-06-05 04:21:13,132 INFO L78 Accepts]: Start accepts. Automaton has 9241 states and 36941 transitions. Word has length 28 [2021-06-05 04:21:13,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:13,133 INFO L482 AbstractCegarLoop]: Abstraction has 9241 states and 36941 transitions. [2021-06-05 04:21:13,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 9241 states and 36941 transitions. [2021-06-05 04:21:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:13,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:13,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:13,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 04:21:13,349 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1444912965, now seen corresponding path program 23 times [2021-06-05 04:21:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:13,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664684710] [2021-06-05 04:21:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:13,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664684710] [2021-06-05 04:21:13,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664684710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:13,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675042397] [2021-06-05 04:21:13,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:13,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:13,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:13,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:13,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:13,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675042397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:13,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:13,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:13,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200237353] [2021-06-05 04:21:13,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:13,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:13,499 INFO L87 Difference]: Start difference. First operand 9241 states and 36941 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:13,977 INFO L93 Difference]: Finished difference Result 12762 states and 48779 transitions. [2021-06-05 04:21:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:13,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:13,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:14,005 INFO L225 Difference]: With dead ends: 12762 [2021-06-05 04:21:14,005 INFO L226 Difference]: Without dead ends: 12722 [2021-06-05 04:21:14,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:21:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-06-05 04:21:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 8983. [2021-06-05 04:21:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 4.0035626809173905) internal successors, (35960), 8982 states have internal predecessors, (35960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 35960 transitions. [2021-06-05 04:21:14,175 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 35960 transitions. Word has length 28 [2021-06-05 04:21:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:14,175 INFO L482 AbstractCegarLoop]: Abstraction has 8983 states and 35960 transitions. [2021-06-05 04:21:14,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:14,175 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 35960 transitions. [2021-06-05 04:21:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:14,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:14,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:14,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 04:21:14,390 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:14,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1089598035, now seen corresponding path program 4 times [2021-06-05 04:21:14,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:14,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291712404] [2021-06-05 04:21:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:14,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291712404] [2021-06-05 04:21:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291712404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402183822] [2021-06-05 04:21:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:14,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:21:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:14,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402183822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:14,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:14,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:21:14,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282229815] [2021-06-05 04:21:14,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:14,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:14,513 INFO L87 Difference]: Start difference. First operand 8983 states and 35960 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:15,247 INFO L93 Difference]: Finished difference Result 30234 states and 120265 transitions. [2021-06-05 04:21:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:21:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:15,324 INFO L225 Difference]: With dead ends: 30234 [2021-06-05 04:21:15,325 INFO L226 Difference]: Without dead ends: 30234 [2021-06-05 04:21:15,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:21:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30234 states. [2021-06-05 04:21:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30234 to 14412. [2021-06-05 04:21:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14412 states, 14411 states have (on average 4.099715495107904) internal successors, (59081), 14411 states have internal predecessors, (59081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 59081 transitions. [2021-06-05 04:21:15,682 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 59081 transitions. Word has length 28 [2021-06-05 04:21:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:15,682 INFO L482 AbstractCegarLoop]: Abstraction has 14412 states and 59081 transitions. [2021-06-05 04:21:15,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:15,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 59081 transitions. [2021-06-05 04:21:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:15,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:15,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:15,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 04:21:15,908 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:15,908 INFO L82 PathProgramCache]: Analyzing trace with hash 473096940, now seen corresponding path program 5 times [2021-06-05 04:21:15,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:15,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271566867] [2021-06-05 04:21:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:15,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:15,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271566867] [2021-06-05 04:21:15,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271566867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:15,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202711747] [2021-06-05 04:21:15,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:15,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:21:15,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:15,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:15,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:16,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202711747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:16,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:16,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:21:16,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953726266] [2021-06-05 04:21:16,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:16,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:16,016 INFO L87 Difference]: Start difference. First operand 14412 states and 59081 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:16,673 INFO L93 Difference]: Finished difference Result 40819 states and 161536 transitions. [2021-06-05 04:21:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:16,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:16,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:16,781 INFO L225 Difference]: With dead ends: 40819 [2021-06-05 04:21:16,782 INFO L226 Difference]: Without dead ends: 40578 [2021-06-05 04:21:16,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:21:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40578 states. [2021-06-05 04:21:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40578 to 24036. [2021-06-05 04:21:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.249511129602663) internal successors, (102137), 24035 states have internal predecessors, (102137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 102137 transitions. [2021-06-05 04:21:17,383 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 102137 transitions. Word has length 28 [2021-06-05 04:21:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:17,383 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 102137 transitions. [2021-06-05 04:21:17,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 102137 transitions. [2021-06-05 04:21:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:17,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:17,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:17,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 04:21:17,629 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1472081004, now seen corresponding path program 6 times [2021-06-05 04:21:17,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:17,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953673128] [2021-06-05 04:21:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:17,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953673128] [2021-06-05 04:21:17,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953673128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:17,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344980345] [2021-06-05 04:21:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:17,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:21:17,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:17,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344980345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:17,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:17,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:17,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009011514] [2021-06-05 04:21:17,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:17,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:17,739 INFO L87 Difference]: Start difference. First operand 24036 states and 102137 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:18,202 INFO L93 Difference]: Finished difference Result 42953 states and 171667 transitions. [2021-06-05 04:21:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:18,316 INFO L225 Difference]: With dead ends: 42953 [2021-06-05 04:21:18,316 INFO L226 Difference]: Without dead ends: 42953 [2021-06-05 04:21:18,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:21:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42953 states. [2021-06-05 04:21:18,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42953 to 24036. [2021-06-05 04:21:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 4.228292074058665) internal successors, (101627), 24035 states have internal predecessors, (101627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 101627 transitions. [2021-06-05 04:21:18,973 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 101627 transitions. Word has length 28 [2021-06-05 04:21:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:18,973 INFO L482 AbstractCegarLoop]: Abstraction has 24036 states and 101627 transitions. [2021-06-05 04:21:18,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 101627 transitions. [2021-06-05 04:21:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:19,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:19,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:19,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 04:21:19,216 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:19,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1500245315, now seen corresponding path program 7 times [2021-06-05 04:21:19,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:19,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828978179] [2021-06-05 04:21:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:19,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828978179] [2021-06-05 04:21:19,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828978179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627969309] [2021-06-05 04:21:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:19,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:19,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627969309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:19,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:19,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:19,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746373098] [2021-06-05 04:21:19,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:19,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:19,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:19,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:19,334 INFO L87 Difference]: Start difference. First operand 24036 states and 101627 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:19,686 INFO L93 Difference]: Finished difference Result 29179 states and 119232 transitions. [2021-06-05 04:21:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:21:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:19,761 INFO L225 Difference]: With dead ends: 29179 [2021-06-05 04:21:19,761 INFO L226 Difference]: Without dead ends: 29131 [2021-06-05 04:21:19,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:21:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29131 states. [2021-06-05 04:21:20,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29131 to 24202. [2021-06-05 04:21:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24202 states, 24201 states have (on average 4.223296557993471) internal successors, (102208), 24201 states have internal predecessors, (102208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24202 states to 24202 states and 102208 transitions. [2021-06-05 04:21:20,381 INFO L78 Accepts]: Start accepts. Automaton has 24202 states and 102208 transitions. Word has length 28 [2021-06-05 04:21:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:20,381 INFO L482 AbstractCegarLoop]: Abstraction has 24202 states and 102208 transitions. [2021-06-05 04:21:20,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 24202 states and 102208 transitions. [2021-06-05 04:21:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:20,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:20,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:20,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:20,628 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1268278573, now seen corresponding path program 8 times [2021-06-05 04:21:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961808990] [2021-06-05 04:21:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:20,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:20,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961808990] [2021-06-05 04:21:20,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961808990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:20,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922486523] [2021-06-05 04:21:20,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:20,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:20,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922486523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:20,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:20,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:21:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066167795] [2021-06-05 04:21:20,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:20,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:20,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:20,749 INFO L87 Difference]: Start difference. First operand 24202 states and 102208 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:21,355 INFO L93 Difference]: Finished difference Result 49310 states and 196485 transitions. [2021-06-05 04:21:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:21:21,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:21,496 INFO L225 Difference]: With dead ends: 49310 [2021-06-05 04:21:21,496 INFO L226 Difference]: Without dead ends: 49310 [2021-06-05 04:21:21,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:21:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49310 states. [2021-06-05 04:21:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49310 to 24542. [2021-06-05 04:21:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.213683223992502) internal successors, (103408), 24541 states have internal predecessors, (103408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103408 transitions. [2021-06-05 04:21:22,154 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103408 transitions. Word has length 28 [2021-06-05 04:21:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:22,154 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103408 transitions. [2021-06-05 04:21:22,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103408 transitions. [2021-06-05 04:21:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:22,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:22,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:22,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 04:21:22,399 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash 559591502, now seen corresponding path program 9 times [2021-06-05 04:21:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:22,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519545015] [2021-06-05 04:21:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:22,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:22,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519545015] [2021-06-05 04:21:22,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519545015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:22,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586543743] [2021-06-05 04:21:22,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:22,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:21:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:22,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586543743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:22,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:22,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:21:22,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913212480] [2021-06-05 04:21:22,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:22,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:22,529 INFO L87 Difference]: Start difference. First operand 24542 states and 103408 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:23,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:23,107 INFO L93 Difference]: Finished difference Result 43190 states and 171488 transitions. [2021-06-05 04:21:23,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:21:23,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:23,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:23,219 INFO L225 Difference]: With dead ends: 43190 [2021-06-05 04:21:23,219 INFO L226 Difference]: Without dead ends: 43115 [2021-06-05 04:21:23,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:21:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2021-06-05 04:21:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 24542. [2021-06-05 04:21:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24542 states, 24541 states have (on average 4.212705268733956) internal successors, (103384), 24541 states have internal predecessors, (103384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24542 states to 24542 states and 103384 transitions. [2021-06-05 04:21:23,820 INFO L78 Accepts]: Start accepts. Automaton has 24542 states and 103384 transitions. Word has length 28 [2021-06-05 04:21:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:23,820 INFO L482 AbstractCegarLoop]: Abstraction has 24542 states and 103384 transitions. [2021-06-05 04:21:23,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24542 states and 103384 transitions. [2021-06-05 04:21:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:23,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:23,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:24,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 04:21:24,062 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:24,062 INFO L82 PathProgramCache]: Analyzing trace with hash -402212590, now seen corresponding path program 10 times [2021-06-05 04:21:24,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:24,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183525795] [2021-06-05 04:21:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:24,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:24,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183525795] [2021-06-05 04:21:24,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183525795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:24,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952204582] [2021-06-05 04:21:24,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:24,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:21:24,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:24,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:24,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952204582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:24,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:24,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:21:24,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42922124] [2021-06-05 04:21:24,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:24,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:24,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:24,187 INFO L87 Difference]: Start difference. First operand 24542 states and 103384 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:24,863 INFO L93 Difference]: Finished difference Result 51588 states and 205543 transitions. [2021-06-05 04:21:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:21:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:25,012 INFO L225 Difference]: With dead ends: 51588 [2021-06-05 04:21:25,013 INFO L226 Difference]: Without dead ends: 51588 [2021-06-05 04:21:25,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:21:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51588 states. [2021-06-05 04:21:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51588 to 24882. [2021-06-05 04:21:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.210200554640087) internal successors, (104754), 24881 states have internal predecessors, (104754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104754 transitions. [2021-06-05 04:21:25,936 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104754 transitions. Word has length 28 [2021-06-05 04:21:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:25,936 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104754 transitions. [2021-06-05 04:21:25,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104754 transitions. [2021-06-05 04:21:25,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:25,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:25,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:26,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:26,186 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash -374048279, now seen corresponding path program 11 times [2021-06-05 04:21:26,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:26,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471855036] [2021-06-05 04:21:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:26,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:26,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471855036] [2021-06-05 04:21:26,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471855036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:26,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816161120] [2021-06-05 04:21:26,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:26,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:21:26,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:26,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:26,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816161120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:26,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:26,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-06-05 04:21:26,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491140665] [2021-06-05 04:21:26,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:26,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:26,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:26,300 INFO L87 Difference]: Start difference. First operand 24882 states and 104754 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:26,976 INFO L93 Difference]: Finished difference Result 39744 states and 158044 transitions. [2021-06-05 04:21:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:26,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:27,081 INFO L225 Difference]: With dead ends: 39744 [2021-06-05 04:21:27,081 INFO L226 Difference]: Without dead ends: 39696 [2021-06-05 04:21:27,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:21:27,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39696 states. [2021-06-05 04:21:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39696 to 24882. [2021-06-05 04:21:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24882 states, 24881 states have (on average 4.209235963184759) internal successors, (104730), 24881 states have internal predecessors, (104730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24882 states to 24882 states and 104730 transitions. [2021-06-05 04:21:27,877 INFO L78 Accepts]: Start accepts. Automaton has 24882 states and 104730 transitions. Word has length 28 [2021-06-05 04:21:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:27,877 INFO L482 AbstractCegarLoop]: Abstraction has 24882 states and 104730 transitions. [2021-06-05 04:21:27,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 24882 states and 104730 transitions. [2021-06-05 04:21:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:27,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:27,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:28,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 04:21:28,130 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1874668720, now seen corresponding path program 12 times [2021-06-05 04:21:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166834014] [2021-06-05 04:21:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:28,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:28,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166834014] [2021-06-05 04:21:28,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166834014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:28,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113062842] [2021-06-05 04:21:28,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:28,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:21:28,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:28,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113062842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:28,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:28,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055012525] [2021-06-05 04:21:28,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:28,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:28,269 INFO L87 Difference]: Start difference. First operand 24882 states and 104730 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:29,313 INFO L93 Difference]: Finished difference Result 51567 states and 205376 transitions. [2021-06-05 04:21:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:29,468 INFO L225 Difference]: With dead ends: 51567 [2021-06-05 04:21:29,468 INFO L226 Difference]: Without dead ends: 51567 [2021-06-05 04:21:29,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51567 states. [2021-06-05 04:21:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51567 to 25308. [2021-06-05 04:21:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25308 states, 25307 states have (on average 4.182123523135891) internal successors, (105837), 25307 states have internal predecessors, (105837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25308 states to 25308 states and 105837 transitions. [2021-06-05 04:21:30,401 INFO L78 Accepts]: Start accepts. Automaton has 25308 states and 105837 transitions. Word has length 28 [2021-06-05 04:21:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:30,401 INFO L482 AbstractCegarLoop]: Abstraction has 25308 states and 105837 transitions. [2021-06-05 04:21:30,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:30,404 INFO L276 IsEmpty]: Start isEmpty. Operand 25308 states and 105837 transitions. [2021-06-05 04:21:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:30,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:30,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:30,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:30,657 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash -652745811, now seen corresponding path program 13 times [2021-06-05 04:21:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:30,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610446697] [2021-06-05 04:21:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:30,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610446697] [2021-06-05 04:21:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610446697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:30,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257875075] [2021-06-05 04:21:30,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:30,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257875075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:30,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:30,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:30,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252065390] [2021-06-05 04:21:30,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:30,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:30,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:30,783 INFO L87 Difference]: Start difference. First operand 25308 states and 105837 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:31,471 INFO L93 Difference]: Finished difference Result 35545 states and 141251 transitions. [2021-06-05 04:21:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:31,569 INFO L225 Difference]: With dead ends: 35545 [2021-06-05 04:21:31,570 INFO L226 Difference]: Without dead ends: 35497 [2021-06-05 04:21:31,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:21:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35497 states. [2021-06-05 04:21:32,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35497 to 25624. [2021-06-05 04:21:32,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.173633064044023) internal successors, (106941), 25623 states have internal predecessors, (106941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106941 transitions. [2021-06-05 04:21:32,232 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106941 transitions. Word has length 28 [2021-06-05 04:21:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:32,232 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106941 transitions. [2021-06-05 04:21:32,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106941 transitions. [2021-06-05 04:21:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:32,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:32,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:32,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 04:21:32,485 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -229548541, now seen corresponding path program 14 times [2021-06-05 04:21:32,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:32,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386222278] [2021-06-05 04:21:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:32,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:32,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386222278] [2021-06-05 04:21:32,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386222278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:32,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076815546] [2021-06-05 04:21:32,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:32,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:32,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076815546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:32,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:32,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:32,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580168181] [2021-06-05 04:21:32,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:32,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:32,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:32,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:32,596 INFO L87 Difference]: Start difference. First operand 25624 states and 106941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:33,210 INFO L93 Difference]: Finished difference Result 46151 states and 182270 transitions. [2021-06-05 04:21:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:21:33,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:33,337 INFO L225 Difference]: With dead ends: 46151 [2021-06-05 04:21:33,337 INFO L226 Difference]: Without dead ends: 46151 [2021-06-05 04:21:33,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:21:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46151 states. [2021-06-05 04:21:33,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46151 to 25624. [2021-06-05 04:21:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166998399875112) internal successors, (106771), 25623 states have internal predecessors, (106771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106771 transitions. [2021-06-05 04:21:34,265 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106771 transitions. Word has length 28 [2021-06-05 04:21:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:34,265 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106771 transitions. [2021-06-05 04:21:34,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106771 transitions. [2021-06-05 04:21:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:34,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:34,326 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:34,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 04:21:34,530 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash -938235612, now seen corresponding path program 15 times [2021-06-05 04:21:34,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:34,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323143882] [2021-06-05 04:21:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:34,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:34,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323143882] [2021-06-05 04:21:34,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323143882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:34,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64868832] [2021-06-05 04:21:34,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:34,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:21:34,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:34,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64868832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:34,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:34,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:34,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57658063] [2021-06-05 04:21:34,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:34,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:34,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:34,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:34,643 INFO L87 Difference]: Start difference. First operand 25624 states and 106771 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:35,219 INFO L93 Difference]: Finished difference Result 32707 states and 131617 transitions. [2021-06-05 04:21:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:21:35,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:35,310 INFO L225 Difference]: With dead ends: 32707 [2021-06-05 04:21:35,310 INFO L226 Difference]: Without dead ends: 32682 [2021-06-05 04:21:35,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:21:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32682 states. [2021-06-05 04:21:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32682 to 25624. [2021-06-05 04:21:35,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25624 states, 25623 states have (on average 4.166530070639659) internal successors, (106759), 25623 states have internal predecessors, (106759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25624 states to 25624 states and 106759 transitions. [2021-06-05 04:21:35,931 INFO L78 Accepts]: Start accepts. Automaton has 25624 states and 106759 transitions. Word has length 28 [2021-06-05 04:21:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:35,931 INFO L482 AbstractCegarLoop]: Abstraction has 25624 states and 106759 transitions. [2021-06-05 04:21:35,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 25624 states and 106759 transitions. [2021-06-05 04:21:35,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:35,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:35,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:36,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 04:21:36,183 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1900039704, now seen corresponding path program 16 times [2021-06-05 04:21:36,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:36,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710842910] [2021-06-05 04:21:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710842910] [2021-06-05 04:21:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710842910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285845124] [2021-06-05 04:21:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:36,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:21:36,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:36,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:36,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:36,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285845124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:36,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:36,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:36,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853505536] [2021-06-05 04:21:36,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:36,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:36,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:36,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:36,294 INFO L87 Difference]: Start difference. First operand 25624 states and 106759 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:36,921 INFO L93 Difference]: Finished difference Result 38112 states and 153561 transitions. [2021-06-05 04:21:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:21:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:37,024 INFO L225 Difference]: With dead ends: 38112 [2021-06-05 04:21:37,024 INFO L226 Difference]: Without dead ends: 38112 [2021-06-05 04:21:37,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:21:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-06-05 04:21:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 25794. [2021-06-05 04:21:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.1656263327259335) internal successors, (107444), 25793 states have internal predecessors, (107444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107444 transitions. [2021-06-05 04:21:37,774 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107444 transitions. Word has length 28 [2021-06-05 04:21:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:37,774 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107444 transitions. [2021-06-05 04:21:37,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107444 transitions. [2021-06-05 04:21:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:37,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:37,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:38,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 04:21:38,027 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:38,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:38,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1871875393, now seen corresponding path program 17 times [2021-06-05 04:21:38,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:38,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105672576] [2021-06-05 04:21:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:38,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:38,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105672576] [2021-06-05 04:21:38,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105672576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:38,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322924063] [2021-06-05 04:21:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:38,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:21:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:38,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:38,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322924063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:38,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:38,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-06-05 04:21:38,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695569023] [2021-06-05 04:21:38,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:21:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:38,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:21:38,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:21:38,180 INFO L87 Difference]: Start difference. First operand 25794 states and 107444 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:38,792 INFO L93 Difference]: Finished difference Result 39804 states and 156168 transitions. [2021-06-05 04:21:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:21:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:38,900 INFO L225 Difference]: With dead ends: 39804 [2021-06-05 04:21:38,900 INFO L226 Difference]: Without dead ends: 39780 [2021-06-05 04:21:38,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:21:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39780 states. [2021-06-05 04:21:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39780 to 25794. [2021-06-05 04:21:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25794 states, 25793 states have (on average 4.165161090218276) internal successors, (107432), 25793 states have internal predecessors, (107432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25794 states to 25794 states and 107432 transitions. [2021-06-05 04:21:39,686 INFO L78 Accepts]: Start accepts. Automaton has 25794 states and 107432 transitions. Word has length 28 [2021-06-05 04:21:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:39,686 INFO L482 AbstractCegarLoop]: Abstraction has 25794 states and 107432 transitions. [2021-06-05 04:21:39,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 25794 states and 107432 transitions. [2021-06-05 04:21:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:39,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:39,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:39,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:39,944 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash 376841606, now seen corresponding path program 18 times [2021-06-05 04:21:39,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:39,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981651867] [2021-06-05 04:21:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:39,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:39,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981651867] [2021-06-05 04:21:39,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981651867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:39,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383269677] [2021-06-05 04:21:39,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:39,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:21:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:40,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383269677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:40,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:40,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 04:21:40,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493460150] [2021-06-05 04:21:40,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:40,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:40,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:40,056 INFO L87 Difference]: Start difference. First operand 25794 states and 107432 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:40,488 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 04:21:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:41,002 INFO L93 Difference]: Finished difference Result 48289 states and 195910 transitions. [2021-06-05 04:21:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:21:41,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:41,144 INFO L225 Difference]: With dead ends: 48289 [2021-06-05 04:21:41,144 INFO L226 Difference]: Without dead ends: 48289 [2021-06-05 04:21:41,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:21:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48289 states. [2021-06-05 04:21:41,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48289 to 25964. [2021-06-05 04:21:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.164272233563148) internal successors, (108117), 25963 states have internal predecessors, (108117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108117 transitions. [2021-06-05 04:21:42,110 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108117 transitions. Word has length 28 [2021-06-05 04:21:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:42,110 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108117 transitions. [2021-06-05 04:21:42,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108117 transitions. [2021-06-05 04:21:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:42,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:42,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:42,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 04:21:42,370 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2144394371, now seen corresponding path program 19 times [2021-06-05 04:21:42,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:42,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762625065] [2021-06-05 04:21:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:42,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:42,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762625065] [2021-06-05 04:21:42,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762625065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:42,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76224938] [2021-06-05 04:21:42,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:42,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76224938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:42,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:42,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 04:21:42,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017344431] [2021-06-05 04:21:42,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:42,502 INFO L87 Difference]: Start difference. First operand 25964 states and 108117 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:43,313 INFO L93 Difference]: Finished difference Result 47194 states and 183148 transitions. [2021-06-05 04:21:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:43,448 INFO L225 Difference]: With dead ends: 47194 [2021-06-05 04:21:43,448 INFO L226 Difference]: Without dead ends: 47098 [2021-06-05 04:21:43,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47098 states. [2021-06-05 04:21:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47098 to 25964. [2021-06-05 04:21:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25964 states, 25963 states have (on average 4.16381003736086) internal successors, (108105), 25963 states have internal predecessors, (108105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:44,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25964 states to 25964 states and 108105 transitions. [2021-06-05 04:21:44,353 INFO L78 Accepts]: Start accepts. Automaton has 25964 states and 108105 transitions. Word has length 28 [2021-06-05 04:21:44,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:44,353 INFO L482 AbstractCegarLoop]: Abstraction has 25964 states and 108105 transitions. [2021-06-05 04:21:44,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:44,353 INFO L276 IsEmpty]: Start isEmpty. Operand 25964 states and 108105 transitions. [2021-06-05 04:21:44,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:44,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:44,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:44,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:44,602 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1673405932, now seen corresponding path program 20 times [2021-06-05 04:21:44,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:44,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612608377] [2021-06-05 04:21:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:44,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:44,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612608377] [2021-06-05 04:21:44,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612608377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:44,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447690460] [2021-06-05 04:21:44,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:44,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:44,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:44,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:44,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:44,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447690460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:44,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:44,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:21:44,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484477374] [2021-06-05 04:21:44,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:44,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:44,721 INFO L87 Difference]: Start difference. First operand 25964 states and 108105 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:45,763 INFO L93 Difference]: Finished difference Result 38914 states and 158503 transitions. [2021-06-05 04:21:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:21:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:45,880 INFO L225 Difference]: With dead ends: 38914 [2021-06-05 04:21:45,880 INFO L226 Difference]: Without dead ends: 38914 [2021-06-05 04:21:45,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:21:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38914 states. [2021-06-05 04:21:46,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38914 to 26620. [2021-06-05 04:21:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26620 states, 26619 states have (on average 4.1402381757391336) internal successors, (110209), 26619 states have internal predecessors, (110209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26620 states to 26620 states and 110209 transitions. [2021-06-05 04:21:46,734 INFO L78 Accepts]: Start accepts. Automaton has 26620 states and 110209 transitions. Word has length 28 [2021-06-05 04:21:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:46,734 INFO L482 AbstractCegarLoop]: Abstraction has 26620 states and 110209 transitions. [2021-06-05 04:21:46,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 26620 states and 110209 transitions. [2021-06-05 04:21:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:46,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:46,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:46,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:46,997 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1786221247, now seen corresponding path program 21 times [2021-06-05 04:21:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:46,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047444860] [2021-06-05 04:21:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:47,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:47,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047444860] [2021-06-05 04:21:47,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047444860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:47,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211680425] [2021-06-05 04:21:47,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:47,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:21:47,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:47,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:47,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211680425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:47,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:47,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 04:21:47,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663376414] [2021-06-05 04:21:47,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:21:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:47,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:21:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:21:47,114 INFO L87 Difference]: Start difference. First operand 26620 states and 110209 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:47,923 INFO L93 Difference]: Finished difference Result 41610 states and 161108 transitions. [2021-06-05 04:21:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:21:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:48,036 INFO L225 Difference]: With dead ends: 41610 [2021-06-05 04:21:48,036 INFO L226 Difference]: Without dead ends: 41514 [2021-06-05 04:21:48,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:21:48,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41514 states. [2021-06-05 04:21:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41514 to 27244. [2021-06-05 04:21:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27244 states, 27243 states have (on average 4.125646955181147) internal successors, (112395), 27243 states have internal predecessors, (112395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:48,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27244 states to 27244 states and 112395 transitions. [2021-06-05 04:21:48,947 INFO L78 Accepts]: Start accepts. Automaton has 27244 states and 112395 transitions. Word has length 28 [2021-06-05 04:21:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:48,947 INFO L482 AbstractCegarLoop]: Abstraction has 27244 states and 112395 transitions. [2021-06-05 04:21:48,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 27244 states and 112395 transitions. [2021-06-05 04:21:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:49,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:49,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:49,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 04:21:49,220 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash -703123463, now seen corresponding path program 22 times [2021-06-05 04:21:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:49,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099867454] [2021-06-05 04:21:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:49,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:49,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099867454] [2021-06-05 04:21:49,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099867454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:49,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827551946] [2021-06-05 04:21:49,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:49,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:21:49,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:49,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827551946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:49,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:49,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:49,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840139372] [2021-06-05 04:21:49,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:49,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:49,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:49,345 INFO L87 Difference]: Start difference. First operand 27244 states and 112395 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:50,074 INFO L93 Difference]: Finished difference Result 48209 states and 191672 transitions. [2021-06-05 04:21:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:21:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:50,207 INFO L225 Difference]: With dead ends: 48209 [2021-06-05 04:21:50,207 INFO L226 Difference]: Without dead ends: 48209 [2021-06-05 04:21:50,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:21:50,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48209 states. [2021-06-05 04:21:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48209 to 26904. [2021-06-05 04:21:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26904 states, 26903 states have (on average 4.114225179348028) internal successors, (110685), 26903 states have internal predecessors, (110685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26904 states to 26904 states and 110685 transitions. [2021-06-05 04:21:51,178 INFO L78 Accepts]: Start accepts. Automaton has 26904 states and 110685 transitions. Word has length 28 [2021-06-05 04:21:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:51,178 INFO L482 AbstractCegarLoop]: Abstraction has 26904 states and 110685 transitions. [2021-06-05 04:21:51,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26904 states and 110685 transitions. [2021-06-05 04:21:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 04:21:51,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:51,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:51,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:51,435 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:51,435 INFO L82 PathProgramCache]: Analyzing trace with hash 865070776, now seen corresponding path program 23 times [2021-06-05 04:21:51,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:51,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606660080] [2021-06-05 04:21:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:51,624 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 04:21:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:51,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:51,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606660080] [2021-06-05 04:21:51,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606660080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:51,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766958215] [2021-06-05 04:21:51,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:51,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:51,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:21:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:51,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766958215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:51,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:51,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 04:21:51,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53171735] [2021-06-05 04:21:51,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:51,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:51,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:51,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:51,754 INFO L87 Difference]: Start difference. First operand 26904 states and 110685 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:52,367 INFO L93 Difference]: Finished difference Result 35478 states and 139558 transitions. [2021-06-05 04:21:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:21:52,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 04:21:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:52,480 INFO L225 Difference]: With dead ends: 35478 [2021-06-05 04:21:52,481 INFO L226 Difference]: Without dead ends: 35428 [2021-06-05 04:21:52,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:21:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35428 states. [2021-06-05 04:21:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35428 to 26239. [2021-06-05 04:21:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26239 states, 26238 states have (on average 4.115595700891836) internal successors, (107985), 26238 states have internal predecessors, (107985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26239 states to 26239 states and 107985 transitions. [2021-06-05 04:21:53,346 INFO L78 Accepts]: Start accepts. Automaton has 26239 states and 107985 transitions. Word has length 28 [2021-06-05 04:21:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:53,346 INFO L482 AbstractCegarLoop]: Abstraction has 26239 states and 107985 transitions. [2021-06-05 04:21:53,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 26239 states and 107985 transitions. [2021-06-05 04:21:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 04:21:53,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:53,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:53,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 04:21:53,602 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash 245948648, now seen corresponding path program 24 times [2021-06-05 04:21:53,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:53,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194431940] [2021-06-05 04:21:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:53,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:53,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194431940] [2021-06-05 04:21:53,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194431940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:53,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044093161] [2021-06-05 04:21:53,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:53,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:21:53,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:21:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:53,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044093161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:53,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:53,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-06-05 04:21:53,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083533883] [2021-06-05 04:21:53,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:21:53,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:53,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:21:53,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:53,934 INFO L87 Difference]: Start difference. First operand 26239 states and 107985 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:54,713 INFO L93 Difference]: Finished difference Result 29258 states and 119012 transitions. [2021-06-05 04:21:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:21:54,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 04:21:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:54,801 INFO L225 Difference]: With dead ends: 29258 [2021-06-05 04:21:54,801 INFO L226 Difference]: Without dead ends: 29122 [2021-06-05 04:21:54,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:21:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-06-05 04:21:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 26985. [2021-06-05 04:21:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26985 states, 26984 states have (on average 4.111139934776164) internal successors, (110935), 26984 states have internal predecessors, (110935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26985 states to 26985 states and 110935 transitions. [2021-06-05 04:21:55,367 INFO L78 Accepts]: Start accepts. Automaton has 26985 states and 110935 transitions. Word has length 31 [2021-06-05 04:21:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:55,367 INFO L482 AbstractCegarLoop]: Abstraction has 26985 states and 110935 transitions. [2021-06-05 04:21:55,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26985 states and 110935 transitions. [2021-06-05 04:21:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 04:21:55,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:55,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:55,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:55,625 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:55,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -888811328, now seen corresponding path program 25 times [2021-06-05 04:21:55,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:55,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388983143] [2021-06-05 04:21:55,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:21:55,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:55,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388983143] [2021-06-05 04:21:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388983143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:55,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083655828] [2021-06-05 04:21:55,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:55,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:21:55,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:55,901 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 04:21:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:21:56,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083655828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:56,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:21:56,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-06-05 04:21:56,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067204720] [2021-06-05 04:21:56,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:21:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:21:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:21:56,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:21:56,104 INFO L87 Difference]: Start difference. First operand 26985 states and 110935 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:21:56,706 INFO L93 Difference]: Finished difference Result 30378 states and 123415 transitions. [2021-06-05 04:21:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:21:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 04:21:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:21:56,793 INFO L225 Difference]: With dead ends: 30378 [2021-06-05 04:21:56,793 INFO L226 Difference]: Without dead ends: 30174 [2021-06-05 04:21:56,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:21:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30174 states. [2021-06-05 04:21:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30174 to 27681. [2021-06-05 04:21:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27681 states, 27680 states have (on average 4.11296965317919) internal successors, (113847), 27680 states have internal predecessors, (113847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27681 states to 27681 states and 113847 transitions. [2021-06-05 04:21:57,514 INFO L78 Accepts]: Start accepts. Automaton has 27681 states and 113847 transitions. Word has length 31 [2021-06-05 04:21:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:21:57,515 INFO L482 AbstractCegarLoop]: Abstraction has 27681 states and 113847 transitions. [2021-06-05 04:21:57,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:21:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27681 states and 113847 transitions. [2021-06-05 04:21:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 04:21:57,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:21:57,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:21:57,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 04:21:57,777 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:21:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:21:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1735840200, now seen corresponding path program 26 times [2021-06-05 04:21:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:21:57,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124315671] [2021-06-05 04:21:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:21:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:21:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:21:57,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:21:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124315671] [2021-06-05 04:21:57,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124315671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:21:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945100406] [2021-06-05 04:21:57,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:21:57,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:21:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:21:57,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:21:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:21:58,088 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-06-05 04:21:58,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 04:21:58,305 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:212) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:585) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:76) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:408) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-06-05 04:21:58,309 INFO L168 Benchmark]: Toolchain (without parser) took 73618.05 ms. Allocated memory was 358.6 MB in the beginning and 12.5 GB in the end (delta: 12.2 GB). Free memory was 338.2 MB in the beginning and 9.2 GB in the end (delta: -8.9 GB). Peak memory consumption was 3.3 GB. Max. memory is 16.0 GB. [2021-06-05 04:21:58,309 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory is still 339.3 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:21:58,309 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.21 ms. Allocated memory is still 358.6 MB. Free memory was 338.1 MB in the beginning and 336.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:21:58,309 INFO L168 Benchmark]: Boogie Preprocessor took 10.95 ms. Allocated memory is still 358.6 MB. Free memory was 336.7 MB in the beginning and 335.7 MB in the end (delta: 952.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:21:58,309 INFO L168 Benchmark]: RCFGBuilder took 241.91 ms. Allocated memory is still 358.6 MB. Free memory was 335.7 MB in the beginning and 323.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 04:21:58,309 INFO L168 Benchmark]: TraceAbstraction took 73344.61 ms. Allocated memory was 358.6 MB in the beginning and 12.5 GB in the end (delta: 12.2 GB). Free memory was 323.4 MB in the beginning and 9.2 GB in the end (delta: -8.9 GB). Peak memory consumption was 3.2 GB. Max. memory is 16.0 GB. [2021-06-05 04:21:58,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory is still 339.3 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.21 ms. Allocated memory is still 358.6 MB. Free memory was 338.1 MB in the beginning and 336.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.95 ms. Allocated memory is still 358.6 MB. Free memory was 336.7 MB in the beginning and 335.7 MB in the end (delta: 952.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 241.91 ms. Allocated memory is still 358.6 MB. Free memory was 335.7 MB in the beginning and 323.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 73344.61 ms. Allocated memory was 358.6 MB in the beginning and 12.5 GB in the end (delta: 12.2 GB). Free memory was 323.4 MB in the beginning and 9.2 GB in the end (delta: -8.9 GB). Peak memory consumption was 3.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_aux_mod_x1_24_53_119 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:198) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...